With the development of science and technology, mankind has entered the era of electronic information, and more and more electrical and electronic equipment have penetrated into every corner of society. At present, electronic products use a large number of engineering plastics as structures. It is easy to generate static electricity and hysteresis in the electromagnetic field. It has almost no barrier effect on the electromagnetic field, especially the electromagnetic wave is almost "transparent". For the ability of information leakage, certain shielding measures must be taken, and the research of electromagnetic wave shielding materials is particularly important. So what is the purpose of using electromagnetic shielding? The following technical staff will introduce to you:
Electromagnetic waves are the main way of electromagnetic energy propagation. When high-frequency circuits work, electromagnetic waves will be radiated outwards, which will cause interference to other nearby equipment. On the other hand, various electromagnetic waves in space will also be induced into the circuit, causing interference to the circuit. The role of electromagnetic shielding is to cut off the propagation path of electromagnetic waves, thereby eliminating interference. Among the many methods to solve the problem of electromagnetic interference, electromagnetic shielding is the most basic and effective. The biggest advantage of using electromagnetic shielding to solve electromagnetic interference problems is that it will not affect the normal operation of the circuit, so there is no need to make any changes to the circuit.
Isolate external electromagnetic interference to ensure normal operation of indoor electronic and electrical equipment. Especially in the measurement and testing of electronic components and electrical equipment, the main function of the electromagnetic shielding room (or dark room) is used to simulate the ideal electromagnetic environment to improve the accuracy of the detection results. Block indoor electromagnetic radiation from spreading to the outside world. Strong electromagnetic radiation sources should be shielded and isolated to prevent interference with the normal operation of other electronic and electrical equipment and even damage to the health of the staff.
Prevent information leakage of electronic communication equipment and ensure information security. Electronic communication signals will be shielded and transmitted to the outside world in the form of electromagnetic radiation (ie TEMPEST phenomenon), and the enemy can intercept and restore them by using monitoring equipment. The electromagnetic shielding room is an effective measure to ensure information security.
Military command communication elements must have the ability to resist electromagnetic interference from the enemy. In extreme circumstances such as electromagnetic interference attacks or even nuclear explosions, combined with other protective elements, electronic communication equipment is protected from damage and normal operation. The electromagnetic pulse protection room is a special product developed on the basis of the electromagnetic shielding room and combined with the special requirements of electromagnetic pulse protection in the military field.